Consider the following statements.
I) Dead cells of the skin prevents pathogen entry. II)Skin secretes oil that makes skin surface acidic. III)Skin secretes sweat that makes surface acidic.
Which of the following given above are correct?

Options

A. I and II
B. I and III
C. II and III
D. I, II and III

Answer

To solve the question, we need to evaluate each of the three statements regarding the skin's role in preventing pathogen entry.

### Step-by-Step Solution:

1. **Evaluate Statement I**: "Dead cells of the skin prevent pathogen entry."
- The outermost layer of the skin, known as the epidermis, is composed of dead skin cells. These dead cells form a tough barrier that helps prevent pathogens (like bacteria and viruses) from entering the body.
- **Conclusion**: This statement is **correct**.

2. **Evaluate Statement II**: "Skin secretes oil that makes skin surface acidic."
- The skin does secrete oil (sebum), which helps to keep the skin moisturized and acts as a barrier against pathogens. However, sebum itself is not acidic; it is more neutral in pH. The oil helps in maintaining skin integrity but does not contribute to acidity.
- **Conclusion**: This statement is **incorrect**.

3. **Evaluate Statement III**: "Skin secretes sweat that makes surface acidic."
- Sweat is secreted by sweat glands and has a slightly acidic pH, which helps to inhibit the growth of certain pathogens. The acidity of sweat contributes to the skin's defense mechanism.
- **Conclusion**: This statement is **correct**.

### Final Evaluation:
- Based on the evaluations:
- Statement I is correct.
- Statement II is incorrect.
- Statement III is correct.

Thus, the correct statements are **I and III**.

### Answer:
The correct options are **I and III**.

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